From p. 97, a description of "Hollywood studio manager Monroe Stahr, clearly based on Irving Thalberg (head of the film company Metro-Goldwyn-Mayer), whom Fitzgerald had encountered several times." (Wikipedia)

Like many brilliant men, he had grown up dead cold. Beginning at about twelve, probably, with the total rejection common to those of extraordinary mental powers, the "See here: this is all wrong -- a mess -- all a lie -- and a sham --," he swept it all away, everything, as men of his type do; and then instead of being a son-of-a-bitch as most of them are, he looked around at the barrenness that was left and said to himself, "This will never do." And so he had learned tolerance, kindness, forebearance, and even affection like lessons. (emphasis in original)